require "digest/sha1"

module Devise
  module Encryptable
    module Encryptors
      # = RestfulAuthenticationSha1
      # Simulates Restful Authentication's default encryption mechanism.
      # Warning: it uses Devise's pepper to port the concept of REST_AUTH_SITE_KEY
      # Warning: it uses Devise's stretches configuration to port the concept of REST_AUTH_DIGEST_STRETCHES. Should be set to 10 in
      # the initializer to simulate the default behavior.
      class RestfulAuthenticationSha1 < Base

        # Generates a default password digest based on salt, pepper and the
        # incoming password.
        def self.digest(password, stretches, salt, pepper)
          digest = pepper
          stretches.times { digest = Digest::SHA1.hexdigest([digest, salt, password, pepper].flatten.join('--')) }
          digest
        end

      end
    end
  end
end
